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Allen Robert F.; Heller Katherine C.; Pons Matthew A.: Multiplication operators on S2(D). In: Acta scientiarum mathematicarum, (81) 3-4. pp. 575-587. (2015)
Pons Matthew A.: Composition operators on Besov and Dirichlet type spaces of the ball. In: Acta scientiarum mathematicarum, (77) 3-4. pp. 525-550. (2011)